Days In Month

This algorithm finds the total days in a month according to the input date.

• C#
• VB.Net
• C
• C++
• PHP

									function IsLeapYear($year) {
	return ($year % 4 == 0 && ($year % 100 != 0 || $year % 400 == 0));
}

function GetDaysInMonth($year, $month) {
	$daysInMonth = 0;

	if ($month == 4 || $month == 6 || $month == 9 || $month == 11)
	{
		$daysInMonth = 30;
	}
	else if ($month == 2)
	{
		if (IsLeapYear($year))
		{
			$daysInMonth = 29;
		}
		else
		{
			$daysInMonth = 28;
		}
	}
	else
	{
		$daysInMonth = 31;
	}

	return $daysInMonth;
}
								

Example

									$value = GetDaysInMonth(2016, 2);
								

Output

									29